Traction-wheel



H. W. KARDELL.

THACTION WHEEL. APPLICATION FILED MAIL 12. 1917;

Patented Oct. 14, 1919.

3 SHEETS-SHEET l- ;3, m m m H. ,W. KARDELL. RACTION WHE"LJ APPLICATION LED MAR. 12. 1911.

1,318,880. Patented 0ct.14,1919.

3 SHEETSSHEET 2.

H. w. KARDELL, TRACTION WHEELQ APPLICATION FILED MAR. 12. 1917.

Patented Oct. 14, 1919.

3 SHEETSSHEE 3.

UNITED STATES PATENT OFFICE.

.HENRY W. KARDELL, OIE ST. LOUIS, MISSOUR, SSIGNOR' T KARDELL TRACTOR &

TRUCK COMPANY, A CORPORATION OF DELAWARE.

TRACTION-W-EEL.

Specification of Lettcrs Patent. P t t d Oct. 14, 1919.

Application fi1ed Mardi 12, 1917.. Serial No. 154,228.

' T0 aZZ wlwm z'2f may concern Be it known that I, HENRY WV. KARDELL, a citizen of the United States of America, a resident of the city of St. Louis, State of Missouri, have invented certain new and useful Iinprovements in Traction-WVheels, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, formmg a partof this specification. 7

My invention relates to a traction wheel for use on farm tractors or other vehic1es intended to be operated on soft soil, the invention having for one of its objects the production of a wheel of this kind, the rim of which is composed of a plurality of seg ments, thereby making it possible to cast the ground tread elements of the rim as integra1 parts with the frame of the rim. Another object of the invention is to provide eflcient connections between the rim segments. A further object of the invention is t0 50 form the tread elements as to provide for lateral movement of mud or slippery earth when it is encountered by these elements, so that it will be thrown s1dew1se from the periphery of the wheel, in order that the gr1pping elements may obtain a more perfect hold. Still another ob]ect of the invention is to provide auxiliary tread means bv which the ground gripping ciements are held out of contact with a roadway when the traction wheel is moving upon a roadway or hard surface. v 7

Figure I is a side elevation of the rim.and

spokes of my traction wheel, the 'hub of the whee1 being omitted.

Fig. II is an enlarged side view of a fragment of the wheel rim. V

Fig. III is an enlarged fragmentary longitudinal section. 7

Fig. IV is an enlarged view lookmg at the periphery of a fragment of the wheel rim, showing the joint at the jui1ction of two of the rim segments.

Fig. V is a view of a fragment of the wheel rim, looking at the inner face thereof.

Fig-V1 is a cross section through the rim taken at a point between two ofthe tread webs. 7

Fig. VII is an enlarged view lookingat the inner face of the Wheel rim at the location of one of the joints betweenr1m -seg ments, the central portions of the tread webs being broken out.

Fig. VIII is an en12trged longitudinal -rim.

fragmentary section at the location of one of the joints in the Wheel rim.

Fig. IX is an enlarged fragmentary sect on showing one of the auxiliary tread sect1ons.

Fig. X is a cross section on line XX, Fig. IX.

The rim of my traction wheel is composed of a plurality of segments A having side webs 1, the said side webs being joined to each other by fastening devices 2, preferably rivets. The side websare alined at the ends of the segments so that said webs abut, and, to secure overlapping relation, said side webs are each formed at one end with a tongue 3 which is offset ;laterally from the body of the Web (569. Figs. IV, VII and VIII). The fastening devices 2 extend from the side webs to the transverse center of the rim. The tread webs slope inwardly from the periphery ofthe rim and rearwardly relative to the direction (indicated by arrows Figs. I, II and III) in which the rim is intended to turnwhen revolvingon the ground during forward movement of a vehicle in which the rimis used.

At the front edges of the tread webs, which are those edgesfnearest the periphery of my Wheel rim, are ground gripping toes 5. These toes correspond in their contour to the contour of the tread webs from which they extend at angles, as Seen in the drawings. The gripping toes are of approximately Ushape and they,therefore, bite into the ground in very much the same manner as a horse-shoe so that the purchaseob tained is one very unlikely to result in slip- -page. The rear Convex faces of the grip- -ping toes lead to the sides of the. wheel rim and extend tothe outer sidefaces {of said The side webs 1 of the segrnentszA' ar e eliminated immediately back of the toes 5,

providinggaps 6 through Which soft mud,

when encountered, may pass after moving forwardly and laterally along the outer faces of the tread webs while said tread webs are in contact With the ground.

During the revolutions of my traction wheel the tread elements of the Wheel rim as indicated by arrows Figs. I, II and 111, each ground gripping toe 5 contacting with the ground before the tread Web by Which it is carried touches the ground. The tread web then reaches the ground adjacent to said toe and compresses the ground instead of sinking thereinto as the toe does. The tread webs being arranged at tangents to the axis of the rim and being separated from each other support the load imposed upon them and at the same time permit soil to pass readily between them and not be come lodged between the webs.

A highly important charactcristic of my traction wheel is that it is self cleaning, and earth which is liable t0 adhere to the tread of a traction wheel, for example, mud, is constantly discharged laterally from the tread webs 4.-, this being due to the peculiar shape of the tread webs. These tread webs, being bulged outwardly relative to the axis of the traction Wheel contact first With the ground, and as the webs lead laterally at each side of their apexes, and also forwardly toward the ground gripping toes 5 and the gaps 6 at the sides of the wheel rim, any soft earth liable t0 adhere to the tread webs is caused to move in the directions in Which said webs slope. Consequcntly, such earth is expressed from beneath the tread Webs through the gaps 6, and there is no opportunity for the tread members and the ground g1ipping toes carried thereby gathering accumulations cf earth t0 interfere with the intended surface of the traction wheel inwhich they are incorporated, even though such wheel is being operated in soil of an adhesive nature. 1

7 designates auxiliary tread sections secured to the rim of my traction wheel at its peripher, and adapted to support the transverse tread elements out of contact with the ground when the wheel rim is traversing a hard roadway. These rim sections are of bar form in cross section and curved in conformity withthe periphoral curvature of the wheel rim. At one end of each section 7 is a rearwardly extending hook 8 adapted to embrace the forward portion of one of the transverse tread webs 4, while at the opposite end of said section is an inwardly extending arm 9 adapted to Occupy a position between two of the transverse tread webs located at a distance from the web engaged by the hook 8. The arm 9 receives a connecting rod 10 arranged substantially parallel with two of the trans- -hereunto afiix my signature;

verse tread webs, between which it is positioned, and upon this connecting rod is a bock look 11 which engages the rear end of a transverse tread web 4: immediatcly baok of the rear end of the auxiliary tread section 7. The connecting rod 10 is provided with a mit 12, and, when this nut is adjusted upon said rod, the block 11 is so moved as to draw the auxiliary tread section snugly into engagement with the toes 5 on the transverse tread members 4, and hold said sections firmly in place at the periphery of the wheel rim.

I claim l. A traction wheel rim comprising sid webs and transverse tread webs between said side webs, said transverse Webs being arranged in toto diagonally relative to the axis of the rim and bulging outwardl relative to said axis from the side webs to the transverse center of the rim.

' 2. A traction wheel rim comprising side webs and transverse tread webs betWeen said side webs, said transverse tread webs being bulged outwardly relative to the axis of the rim and extending in toto diagonally rela, tive to said axis, each of said transverse webs being provided with a ground gripping toe. r

3. A traction wheel rim comprising side webs and transverse tread webs betWeen said side webs, said transverse tread webs being bulged outwardly relative to the axis of the rim and extending in toto diagonally relative to said axis, each of said transversc webs being provided with a U-shaped ground gripping toc.

4:. A traction wheel rim comprising side webs and transverse tread webs between said side webs, said transverse tread Webs being provided with ground gripping toes and being bulged outwardly relative to the axis of the rim and extending in toto diagonally relative to said axis, said side Webs being partially omitted adjacentto said ground gripping toes to provide gaps through which earth, moving along the sloping face of said tread Webs, maypass frombeneath the wheel rim.

5. The combination with a Wheel rim ha'v- 1ng transverse tread Webs, of auxili'ar tread sections fitted to, said webs, each ,01?

said-sections being providedat one end with extending arm of said auxiliary tread scction.

. In testimon'y that I claim the foregoingl r HENRY W. KARDELL.

' opies of this*ptent may be obta ind for five cents each, by addressng the fComini;sionexfi ofIantu,

' Washington, D. G. 

